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  1. Hive
  2. HIVE-23122

LLAP: TaskExecutorService should log details about task eviction decision details

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 4.0.0
    • Component/s: llap
    • Labels:
      None

      Description

      TaskExecutorService maintains a waitQueue, and can evict a task in favor of another. Under the hood, the queue uses a configurable comparator. The currently available comparators typically use the following properties of a task(wrapper):
      getWithinDagPriority: related to vertex
      currentAttemptStartTime
      firstAttemptStartTime
      knownPending: remaining upstream tasks

      The problem is, when an eviction happens, the INFO level message doesn't provide any insight about the decision, only attempts ids like below:

      attempt_1585248378306_0010_72_02_000096_8 evicted from wait queue in favor of attempt_1585248378306_0003_175_02_000079_175 because of lower priority
      

        Attachments

        1. HIVE-23122.02.patch
          2 kB
          László Bodor
        2. HIVE-23122.03.patch
          2 kB
          László Bodor
        3. HIVE-23122.03.patch
          2 kB
          László Bodor

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              • Assignee:
                abstractdog László Bodor
                Reporter:
                abstractdog László Bodor
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                Dates

                • Created:
                  Updated:
                  Resolved: